使用SQL语句逐条更新每条记录

有些时候，我们希望同时更新表中的多条记录，但更新的值不一样。

declare @i int

declare @j int

declare @phone varchar(20)

set @j=1 select @i=count(*) from LatestLocation

DECLARE L_cursor CURSOR FOR SELECT Phone FROM LatestLocation

OPEN L_cursor

while @j<=@i

begin

FETCH NEXT FROM L_cursor into @phone update LatestLocation set LocationY = 32.009795 - 0.014887*RAND() * 0.7 where Phone=@phone

set @j=@j+1

end

CLOSE L_cursor

DEALLOCATE L_cursor